package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;

/**
 * @PROJECT_NAME:sky-take-out
 * @NAME: DishController
 * @AUTHOR:$$
 * @Date:2023-08-18
 * @DESCRIPTION:
 **/
@RestController("userDishController")
@RequestMapping("user/dish")
@Slf4j
@Api(tags = "c端-菜品浏览接口")
public class DishController {
    @Autowired
  private DishService dishService;
//
//    /**
//     * 根据分类id查询菜品
//     * @param categoryId
//     * @return
//     */
//    @GetMapping("/list")
//    @ApiOperation("根据分类id查询菜品")
//    public Result<List<DishVO>> list (Long categoryId){
//        Dish dish = new Dish();
//        dish.setCategoryId(categoryId);
//        dish.setStatus(StatusConstant.ENABLE);
//        List<DishVO> list =
//        dishService.listWithFlavor(dish);
//        return Result.success(list);
//    }
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {

        //构造redis中的key，规则：dish_分类id
        String key = "dish_" + categoryId;

        //查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if(list != null && list.size() > 0){
            //如果存在，直接返回，无须查询数据库
            return Result.success(list);
        }
        ////////////////////////////////////////////////////////
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

        //如果不存在，查询数据库，将查询到的数据放入redis中
        list = dishService.listWithFlavor(dish);
        ////////////////////////////////////////////////////////
        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);
    }

    /**
     * 清理缓存数据
     * @param pattern
     */
    private void cleanCache(String pattern){
        Set keys  = redisTemplate.keys(pattern);
        redisTemplate.delete(keys);
    }

    @PostMapping
    @ApiOperation("新增菜品")
    public Result save (@RequestBody DishDTO dishDTO){
        log.info("新增菜品:{}",dishDTO);
        dishService.saveWithFlavor(dishDTO);
        //清理缓存数据
        String key = "dish_"+
                dishDTO.getCategoryId();
                cleanCache(key);
                return Result.success();
    }

    public Result<String> startOrStop(@PathVariable
                                      Integer status,Long id){
        dishService.startOrStop(status,id);
        //将所有的菜品缓存数据清理，所有以dish_开头的key
        cleanCache("dish_");
        return Result.success();
    }

}
